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code-editor.js
File metadata and controls
822 lines (671 loc) · 21.8 KB
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class Formatter {
constructor(editorElement) {
this.editorElement = editorElement;
}
static formatNode(ctx, node, className, title = "", offsetStart = 0, offsetEnd = 0) {
if(node === null) {
return;
}
ctx.formatMarkers.push(new OpeningTag(node.startIndex + offsetStart, `${ctx.cls} ${className}`, title));
ctx.formatMarkers.push(new ClosingTag(node.endIndex + offsetEnd));
}
format(formatMarkers, text) {
let indexOffset = 0;
formatMarkers.forEach(fmt => {
let tagString = fmt.toHTML();
text = text.slice(0, fmt.index + indexOffset) + tagString + text.slice(fmt.index + indexOffset);
indexOffset += tagString.length;
});
return text;
}
clearFormatting() {
let finished = false;
while (!finished) {
let tags = $(this.editorElement).find("span.hght, span.lnt");
if(tags.length == 0) {
finished = true;
}
else {
tags.each((_i, e) => {
$(e).replaceWith($(e).html());
});
}
}
}
}
class FormatTag {
constructor(index) {
this.index = index;
}
static sort(f1, f2) {
return f1.index - f2.index;
}
}
class OpeningTag extends FormatTag {
constructor(index, htmlClassName, title="") {
super(index, htmlClassName);
this.htmlClassName = htmlClassName;
this.title = title;
}
toHTML() {
return `<span class="${this.htmlClassName}" title="${this.title}">`;
}
}
class ClosingTag extends FormatTag {
constructor(index) {
super(index);
}
toHTML() {
return "</span>";
}
}
class LogMessage {
constructor(cls, description, row, column, offset) {
this.cls = cls;
this.description = description;
this.row = row;
this.column = column;
this.offset = offset;
}
toHTML() {
let positionString = "";
if(this.row !== null) {
positionString += this.row + ":";
}
if(this.column !== null) {
positionString += this.column;
}
positionString = positionString ? `<span class="pos">${positionString}</span> ` : "";
return `<span class=\"msg ${this.cls}\" data-offset=\"${this.offset}\">${positionString}${this.description}</span>`;
}
}
class Logger {
constructor(countsElement, noErrorsMessageElement, messagesElement) {
this.countsElement = countsElement
this.noErrorsMessageElement = noErrorsMessageElement
this.messagesElement = messagesElement
this.messages = []
}
static nodeToMessage(ctx, node, cls, description, offsetStart = 0) {
ctx.messages.push(
new LogMessage(
cls,
description,
node.startPosition.row + 1,
node.startPosition.column,
node.startIndex + offsetStart
)
);
}
init(msgClickFn) {
this.messagesElement.on("click", ".msg", msgClickFn);
this.refresh();
}
clear() {
this.messages = [];
}
setMessages(messages) {
this.messages = messages;
}
appendMessage(msg) {
this.messages.push(msg);
}
refresh() {
let errorCnt = 0;
let warningCnt = 0;
this.countsElement.html("");
this.messagesElement.html("");
if(this.messages.length == 0) {
this.noErrorsMessageElement.show();
}
else {
this.noErrorsMessageElement.hide();
}
this.messages = this.messages.sort((m1, m2) => m1.offset - m2.offset);
this.messages.forEach((m) => {
this.messagesElement.append(m.toHTML());
if(m.cls == "err") {
errorCnt += 1;
}
else if(m.cls == "warning") {
warningCnt += 1;
}
});
if(errorCnt == 0 && warningCnt == 0) {
this.countsElement.html("No errors");
}
else {
this.countsElement.html(`(${errorCnt} errors, ${warningCnt} warnings)`);
}
}
}
class Linter extends Traverser {
constructor(cls) {
super();
this.cls = cls;
}
lint(tree, text) {
let formatMarkers = [];
let messages = [];
let symbolTable = {};
this.inorder(tree, this.processNodePrep, {
"text": text,
"symbolTable": symbolTable
});
this.inorder(tree, this.processNode, {
"text": text,
"formatMarkers": formatMarkers,
"messages": messages,
"symbolTable": symbolTable,
"cls" : this.cls
});
return [formatMarkers, messages];
}
processNodePrep(node, ctx) {
let skipDescendants = false;
switch (node.type) {
case "rule_decl":
let ruleName = getStringByFieldName(node, "name");
ctx.symbolTable[ruleName] = { "type" : "rule" };
break;
default:
break;
}
return skipDescendants;
}
// Language specific function
processNode(node, ctx) {
let skipDescendants = false;
if(node.isMissing) {
Formatter.formatNode(ctx, node, "err", `Missing ${node.type}`, -1);
Logger.nodeToMessage(ctx, node, "err", `Missing ${node.type}!`, -1);
return skipDescendants;
}
switch (node.type) {
case "ERROR":
Formatter.formatNode(ctx, node, "err", "Syntax error");
Logger.nodeToMessage(ctx, node, "err", "Syntax error!");
skipDescendants = true;
break;
case "global_settings":
let argumentsNode = getChildByFieldName(node, "arguments");
Linter._checkArgs(ctx, GlobalSettings, argumentsNode);
break;
case "shape":
var entryPointName = getStringByFieldName(node, "entry_point");
var entryPointNode = getChildByFieldName(node, "entry_point");
if(!Object.hasOwn(ctx.symbolTable, entryPointName) ||
ctx.symbolTable[entryPointName].type !== "rule") {
Formatter.formatNode(ctx, entryPointNode, "serr", "Bad entry point!");
Logger.nodeToMessage(ctx, entryPointNode, "err", `Entry point '${entryPointName}' is not a rule!`);
}
break;
case "non_terminal":
Linter._checkNonterminal(ctx, node);
break;
case "terminal":
Linter._checkTerminal(ctx, node);
break;
case "rule_decl":
var name = getStringByFieldName(node, "name");
var weight = getFloatByFieldName(node, "weight", null);
var weightNode = getChildByFieldName(node, "weight");
if(weight !== null && weight < 0) {
Formatter.formatNode(ctx, weightNode, "serr", "Invalid weight!");
Logger.nodeToMessage(ctx, weightNode, "err", `Weight of rule '${name}' must be non-negative number! Got ${weight}`);
}
break;
default:
break;
}
return skipDescendants;
}
static _checkTerminal(ctx, node) {
var type = getStringByFieldName(node, "type");
let typeCls = null;
switch (type) {
case "square":
typeCls = Square;
break;
case "circle":
typeCls = Circle;
break;
}
let argumentsNode = getChildByFieldName(node, "arguments");
Linter._checkArgs(ctx, typeCls, argumentsNode);
}
static _checkNonterminal(ctx, node) {
var name = getStringByFieldName(node, "name");
var nameNode = getChildByFieldName(node, "name");
if(!Object.hasOwn(ctx.symbolTable, name) || ctx.symbolTable[name].type !== "rule") {
Formatter.formatNode(ctx, nameNode, "serr", "Invalid nonterminal!");
Logger.nodeToMessage(ctx, nameNode, "err", `Nonterminal '${name}' is not a rule!`);
return;
}
let argumentsNode = getChildByFieldName(node, "arguments");
const symbolCls = NonTerminal;
Linter._checkArgs(ctx, symbolCls, argumentsNode);
}
static _checkArgs(ctx, symbolCls, argumentsNode) {
function isNameDuplicated(checkedArgs, argName, argNameNode) {
if(checkedArgs.includes(argName)) {
Formatter.formatNode(ctx, argNameNode, "serr", "Already defined!");
Logger.nodeToMessage(ctx, argNameNode, "err", `Value of argument '${argName}' was already defined!`);
return true;
}
checkedArgs.push(argName);
return false
}
let args = argumentsNode.childrenForFieldName("arg");
let argsCnt = 0;
let namedArgsCnt = 0;
if (Object.keys(symbolCls.ARGS).length < args.length) {
Formatter.formatNode(ctx, argumentsNode, "serr", "Too many arguments!");
Logger.nodeToMessage(ctx, argumentsNode, "err", `Too many arguments!`);
return;
}
let checkedArgs = [];
args.forEach((argNode) => {
argsCnt++;
let argName = getStringByFieldName(argNode, "name");
let argNameNode = getChildByFieldName(argNode, "name");
let argValNode = getChildByFieldName(argNode, "value");
if(namedArgsCnt > 0 && argName === null) {
Formatter.formatNode(ctx, argNode, "serr", "Unnamed argument after named ones!");
Logger.nodeToMessage(ctx, argNode, "err", "Unnamed argument after named ones!");
return;
}
if(argName !== null) {
namedArgsCnt++;
if(isNameDuplicated(checkedArgs, argName, argNameNode)) {
return;
}
if(!Object.hasOwn(symbolCls.ARGS, argName)) {
Formatter.formatNode(ctx, argNameNode, "serr", "Unknown argument!");
Logger.nodeToMessage(ctx, argNameNode, "err", `Unknown argument '${argName}'!`);
return;
}
const parsedArgVal = symbolCls.ARGS[argName](argValNode);
if(parsedArgVal === null) {
Formatter.formatNode(ctx, argValNode, "serr", "Invalid value!");
Logger.nodeToMessage(ctx, argValNode, "err", `Invalid value of '${argName}'!`);
}
}
else {
const argName = symbolCls.ARG_ORDER[argsCnt - 1];
if(isNameDuplicated(checkedArgs, argName, argNameNode)) {
return;
}
const parsedArgVal = symbolCls.ARGS[argName](argValNode);
if(parsedArgVal === null) {
Formatter.formatNode(ctx, argValNode, "serr", "Invalid value!");
Logger.nodeToMessage(ctx, argValNode, "err", `Invalid value of '${argName}'!`);
}
}
});
}
}
class TokenClass {
constructor(regex, htmlClassName, isKeywordclass = false) {
this.regex = regex;
this.htmlClassName = htmlClassName;
this.isKeywordclass = isKeywordclass;
}
}
class Highlighter extends Traverser {
constructor(cls) {
super();
this.cls = cls;
}
highlight(tree, text) {
let formatMarkers = [];
this.inorder(tree, this.processNode, { "text": text, "formatMarkers": formatMarkers, "cls" : this.cls });
return formatMarkers;
}
// Language specific function
processNode(node, ctx) {
let skipDescendants = false;
if(node.isMissing) {
return true;
}
switch (node.type) {
case "ERROR":
skipDescendants = true;
break;
case "shape":
var entryNode = node.childForFieldName("entry_point");
Formatter.formatNode(ctx, entryNode, "id");
break;
case "rule_decl":
var nameNode = node.childForFieldName("name");
Formatter.formatNode(ctx, nameNode, "id b");
break;
case "argument":
var nameNode = node.childForFieldName("name");
Formatter.formatNode(ctx, nameNode, "argn");
var valNode = node.childForFieldName("value");
Formatter.formatNode(ctx, valNode, "num");
skipDescendants = true;
break;
case "non_terminal":
var nameNode = node.childForFieldName("name");
Formatter.formatNode(ctx, nameNode, "id");
break;
case "comment":
Formatter.formatNode(ctx, node, "comment");
break;
case "startshape":
case "rule":
case "square":
case "circle":
case "global":
Formatter.formatNode(ctx, node, "kw");
break;
default:
break;
}
return skipDescendants;
}
}
class CodeEditor {
static NEWLINE_REGEXP = /(\r?\n)/g;
MAX_REVISIONS = 20
constructor(editor, lineNumbers, msgCounts, noErrorsMsg, msgLog, parser) {
this.editor = editor;
this.lineNumbers = lineNumbers;
this.origLineNumber = null;
this.cursorOffset = 0;
this.highlighter = new Highlighter("hght", editor);
this.linter = new Linter("lnt", editor);
this.formatter = new Formatter(editor);
this.logger = new Logger(msgCounts, noErrorsMsg, msgLog);
this.parser = parser;
this.previousRevisions = [];
this.previousCursors = [];
let userAgentString = navigator.userAgent;
this.isChrome = userAgentString.indexOf("Chrome") > -1;
}
init() {
if(this.isChrome) {
this.editor.prop("contentEditable", "plaintext-only");
}
this.logger.init((e) => {
let targetOffset = $(e.target).data("offset");
this.putCursorToOffset(targetOffset);
});
this.formatCode();
this.initNumbering();
this.editor[0].addEventListener("focus", () => {
let sel = window.getSelection();
let range = sel.getRangeAt(0);
let offset = this.getOffsetInEditor(range.startContainer, range.startOffset);
this.cursorOffset = offset;
});
this.editor[0].addEventListener("beforeinput", (e) => {
this.saveRevision();
if(e.inputType == "deleteContentBackward") {
this._storeCursor(e);
if(window.getSelection().getRangeAt(0).collapsed) {
this.cursorOffset -= 1;
}
}
// if(!this.isChrome) { this._updateNumbering(e); }
});
this.editor[0].addEventListener("input", (e) => {
if(e.inputType !== "deleteContentBackward") {
this._storeCursor(e);
}
this.initNumbering();
this.formatCode();
this._restoreCursor();
});
this.editor[0].addEventListener("keydown", (e) => {
if (e.ctrlKey && e.key == 'z') {
e.preventDefault();
if(this.previousRevisions.length > 0) {
this.editor[0].innerHTML = this.previousRevisions.pop();
this.initNumbering();
this.formatCode();
}
if(this.previousCursors.length > 0) {
this.cursor = this.previousCursors.pop();
this.putCursorToOffset(this.cursor);
}
}
else if(e.key === "Tab") {
e.preventDefault();
this.saveRevision();
const TAB_SEQUENCE = "\t";
let sel = window.getSelection();
let range = sel.getRangeAt(0);
let offset = this.getOffsetInEditor(range.startContainer, range.startOffset);
this.insert(TAB_SEQUENCE, offset);
this._restoreCursor();
return false;
}
});
}
focus() {
this.putCursorToOffset(this.cursorOffset);
}
insert(str, offset = null) {
this.saveRevision();
offset = offset === null ? this.cursorOffset : offset;
let value = this.editor.text();
let newValue = value.substring(0, offset) + str + value.substring(offset);
this.editor.text(newValue);
this.putCursorToOffset(offset + str.length);
this.cursorOffset = offset + str.length;
this.formatCode();
}
saveRevision() {
if(this.previousRevisions.length == this.MAX_REVISIONS) {
this.previousRevisions.shift();
this.previousCursors.shift();
}
this.previousRevisions.push(this.getCode());
let range = window.getSelection().getRangeAt(0);
this.cursorOffset = this.getOffsetInEditor(range.startContainer, range.startOffset);
this.previousCursors.push(this.cursorOffset);
}
formatCode() {
this.formatter.clearFormatting();
let code = this.editor.html().replaceAll(" ", " ").replaceAll("<br>", "\n");
if(code.match(/(\n|<br>)$/) == null) {
code += "\n\n";
}
const tree = this.parser.parse(code);
//console.log(tree.rootNode.toString());
const [ linterFmt, linterMessages ] = this.linter.lint(tree, code);
const fmt = [ ...linterFmt, ...this.highlighter.highlight(tree, code) ];
const sortedFmt = fmt.sort(FormatTag.sort);
const formatted = this.formatter.format(sortedFmt, code);
this.editor.html(formatted);
this.logger.setMessages(linterMessages);
this.logger.refresh();
}
clearFormatting() {
this.formatter.clearFormatting();
}
_restoreCursor() {
this.putCursorToOffset(this.cursorOffset);
}
_storeCursor(_e) {
let range = window.getSelection().getRangeAt(0);
this.cursorOffset = this.getOffsetInEditor(range.startContainer, range.startOffset);
}
getCode() {
return this.editor.text();
}
setCode(newCode) {
this.editor.text(newCode);
this.putCursorToOffset(0);
this.formatCode();
this.initNumbering();
}
initNumbering() {
const originalText = this.getCode();
const originalNewlines = originalText.matchAll(CodeEditor.NEWLINE_REGEXP).toArray();
this.origLineNumber = originalNewlines.length;
if(originalText.match(/(\r?\n)$/g) !== null) {
this.origLineNumber -= 1;
}
this.setLineNumbering(this.origLineNumber);
}
_updateNumbering(e) {
if(e.inputType == "insertFromPaste") {
return; // It is hadnled in input event to be sure that any newline do not disappear
}
var extraNewlines = 0;
var insertedText = "";
if(this.origLineNumber === null) {
const originalText = this.editor.text();
const originalNewlines = originalText.matchAll(CodeEditor.NEWLINE_REGEXP).toArray();
extraNewlines = originalNewlines.length;
this.origLineNumber = 0;
}
let targetRanges = e.getTargetRanges();
if(targetRanges.length > 0) {
let startOffset = this.getOffsetInEditor(
e.getTargetRanges()[0].startContainer,
e.getTargetRanges()[0].startOffset,
);
let endOffset = this.getOffsetInEditor(
e.getTargetRanges()[0].endContainer,
e.getTargetRanges()[0].endOffset,
);
let affectedText = this.editor.text().substring(startOffset, endOffset);
const deletedNewlines = affectedText.matchAll(CodeEditor.NEWLINE_REGEXP).toArray();
extraNewlines -= deletedNewlines.length;
}
if(e.inputType == "insertParagraph") {
insertedText = "\n";
}
else if(e.inputType == "insertText") {
insertedText = e.data;
}
const newNewlines = insertedText.matchAll(CodeEditor.NEWLINE_REGEXP).toArray();
extraNewlines += newNewlines.length;
if(extraNewlines != 0) {
this.setLineNumbering(this.origLineNumber + extraNewlines);
}
}
setLineNumbering(lineNumber) {
this.lineNumbers.html("");
for (let line = 0; line <= lineNumber; line++) {
this.lineNumbers.append(`<div id="l${line}" class="lineno">${line + 1}</div>`)
}
this.origLineNumber = lineNumber;
}
getOffsetInEditor(node, initialOffset) {
let offset = initialOffset;
let editorElement = this.editor[0];
while(node != editorElement) {
let parentNode = node.parentNode;
let childNode = parentNode.firstChild;
while(childNode != node) {
if(childNode.nodeType == Node.TEXT_NODE) {
offset += childNode.length;
}
else {
offset += childNode.innerText.length;
}
childNode = childNode.nextSibling;
}
node = parentNode;
}
return offset;
}
putCursorToOffset(_offset) {
function findNodeOnOffset(node, offset) {
if(node.nodeType == Node.TEXT_NODE && node.length >= offset) {
return [node, offset];
}
let cNode = node.firstChild;
while(cNode !== null) {
let nodeTextLength = cNode.nodeType == Node.TEXT_NODE ? cNode.length : cNode.innerText.length;
if(offset <= nodeTextLength) {
return findNodeOnOffset(cNode, offset);
}
else {
offset -= nodeTextLength;
}
cNode = cNode.nextSibling;
}
return [null, null];
}
let editorElement = this.editor[0];
let [node, offset] = findNodeOnOffset(editorElement, _offset);
let range = document.createRange();
let curSelection = window.getSelection();
range.setStart(node, offset);
range.setEnd(node, offset);
range.collapse(true);
curSelection.removeAllRanges();
curSelection.addRange(range);
}
}
class ChannelControls {
constructor(range, input, display, refreshFn) {
this.range = range;
this.input = input;
this.display = display;
this.refreshFn = refreshFn;
}
static findElementsAndCreate(wrapperElement, channelName, refreshFn) {
return new ChannelControls(
wrapperElement.find(`input[type=range][data-channel=${channelName}]`),
wrapperElement.find(`input[type=number][data-channel=${channelName}]`),
wrapperElement.find(`div.color-picker-display[data-channel=${channelName}]`),
refreshFn,
)
}
setup(initialValue) {
this.range.on("input", () => {
this.input.val(this.range.val());
this.refresh();
});
this.input.on("input", () => {
this.range.val(this.input.val());
this.refresh();
});
this.set(initialValue);
this.refresh();
}
refresh() {
this.refreshFn(this, this.get());
}
set(val) {
this.input.val(val);
this.range.val(val);
this.refresh();
}
get() {
return this.input.val();
}
}
class RGBColorPicker {
constructor(colorPickerElement, defaultColor = [128, 128, 128]) {
this.colorPickerElement = colorPickerElement;
this.resultElement = this.colorPickerElement.find(`div.color-picker-display-result`);
this.channelControls = {
"r" : ChannelControls.findElementsAndCreate(this.colorPickerElement, "r", (ctrls, c) => { ctrls.display.css("background-color", `rgba(255, 0, 0, ${c/255})`); this.refresh(); }),
"g" : ChannelControls.findElementsAndCreate(this.colorPickerElement, "g", (ctrls, c) => { ctrls.display.css("background-color", `rgba(0, 255, 0, ${c/255})`); this.refresh(); }),
"b" : ChannelControls.findElementsAndCreate(this.colorPickerElement, "b", (ctrls, c) => { ctrls.display.css("background-color", `rgba(0, 0, 255, ${c/255})`); this.refresh(); }),
}
Object.entries(this.channelControls).forEach(([c, ctrls], i) => {
ctrls.setup(defaultColor[i]);
});
}
refresh() {
const [r, g, b] = this.get();
this.resultElement.css("background-color", `rgb(${r}, ${g}, ${b})`);
}
get() {
return [ this.channelControls.r.get(), this.channelControls.g.get(), this.channelControls.b.get() ];
}
getString() {
const [r, g, b] = this.get();
return `rgb(${r} ${g} ${b})`
}
}